DoubleZero vs Mailjet: Features, Pricing and User Reviews 2026
Compare features, pricing, reviews, and more to make an informed decision
DoubleZero
DoubleZero is a free, open-source email service you can host yourself using AWS SES for sending and monitoring emails.
Mailjet
Mailjet is an email marketing platform that helps businesses create, send, and track marketing and transactional emails with ease.
DoubleZero
DoubleZero is a free, open-source email service you can host yourself using AWS SES for sending and monitoring emails.
Mailjet
Mailjet is an email marketing platform that helps businesses create, send, and track marketing and transactional emails with ease.
DoubleZero
Self-hosted email service with AWS SES integration
Email monitoring dashboard with delivery tracking
Multi-recipient tracking and analytics
REST API and JavaScript client library
Open source and fully customizable
Docker container deployment
SST automated AWS configuration
Pro version with WYSIWYG editor and automation
Contact and list management capabilities
Team collaboration features
Mailjet
Drag-and-drop email builder with templates
Real-time team collaboration on campaigns
Contact list management and segmentation
Marketing automation and drip campaigns
A/B testing for subject lines and content
Detailed analytics and reporting dashboard
SMTP relay and REST API for developers
Email address validation tools
Multi-user access with role permissions
AI-assisted content creation
Landing page builder
Inbox preview across devices
DoubleZero
DoubleZero offers two pricing options that stand out from typical subscription services.
The Free Version is completely open source and available at no cost. You can download the code, host it yourself, and use all core features including transactional emails, monitoring dashboard, multi-recipient tracking, SMTP endpoint, and REST API access. Your only costs are AWS SES fees, which are extremely low at around $0.10 per thousand emails.
The Pro Version costs $175 as a one-time purchase. This is not a monthly subscription. You buy it once and own it forever. Pro adds powerful features including a WYSIWYG email editor, contact management system, email lists, broadcast campaigns, team collaboration tools, activity feed, and automation workflows.
Both versions require you to provide your own AWS account and hosting, giving you complete control and keeping ongoing costs minimal.
Mailjet
Mailjet offers a range of pricing plans to fit different business needs. The Free plan includes 6,000 emails per month with a daily limit of 200 emails, perfect for getting started with up to 1,000 contacts.
The Essential plan starts at $17 per month for 15,000 emails monthly. This plan removes daily sending limits and adds unlimited contacts, online support, and 500 email validations per month. You also get AI-assisted content creation.
The Premium plan costs $27 per month for 15,000 emails and includes all Essential features plus advanced statistics, marketing automation, A/B testing, landing pages, and priority support. You get 2,000 email previews monthly and can manage up to 20 subaccounts.
For larger organizations, the Custom plan offers tailored solutions with dedicated account management, deliverability consulting, custom user permissions, and specialized training. Pricing is provided upon request based on your specific needs.